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Originally Posted by 3sgte@daspeedof
See your wrong on all accounts.
A turbo car needs a little back pressure to spool up, with a full 3" your gonna get more top end power, with a 2 1/2" your gonna get more low end.
Boost kick in around 3200 rpm, and cut at about 5500 thats for a 2 1/2"pipe straight back
Boost will kick in at 4000 with a straight 3" and last longer, but you lose on the lower end cuse it will take more time to spool up.
Car will be ready to start paint this week, cherry picker is at my place engine will be out sat morning. *Doors are primed, will have the front bumper on sat. *Need to get fenders but that won't stop us from painting the rest of the car. Trunk trim is already un bolted. just needs to come out.
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i hear what you are saying but i dont see proof... scc has run tests on boosted civics, 300zx's rx7 and many other cars on dynos with and with out backpressure and they have also done this with NA cars... in all of the test the more open the exhaust the more power...
in no situation that i can think of has backpressure helped make power.. maybe smooth lines but not make power..